The neurotransmitter released from the nerve terminus at the neuromuscular junction is __________.  

A.  troponin
B.  Ca2+
C.  tropomyosin
D.  acetylcholine


D.  acetylcholine

Biology & Microbiology

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a. Ca2+ b. Cl? c. K+ d. NH4+ e. Na+

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Bicarbonate is an important buffer in blood and its concentration is regulated by the

A) heart. B) lungs. C) liver. D) kidneys. E) pancreas.

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During signal transduction involving G protein and cAMP, what do protein kinases add to target proteins?

a. enzyme b. substrates c. calmodulin d. calcium ions e. phosphate groups

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Aldosterone stimulates the reabsorption of sodium ions here

A) proximal convoluted tubule B) glomerular capsule C) loop of the nephron D) distal convoluted tubule and collecting duct

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